Error code reference

Lennox Hvac Error Code 207

The blower cannot provide the requested CFM due to high static (cutback mode).

First step from the service manual

Check filter and duct system. Replace filter if needed or repair/add duct. The alarm/fault is cleared after the current service demand is satisfied.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

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207 on my Lennox HVAC

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The blower cannot provide the requested CFM due

From Service Manual 831385, p.37:

1.Check filter and duct system. Replace filter if needed or repair/add duct. The alarm/fault is cleared after the current service demand is satisfied.

2.Inspect the exhaust duct from the unit to the wall cap. A crushed or lint-blocked duct is the most common cause of airflow-related faults.

3.Measure static pressure at the blower housing with the lint screen removed. Expected: ≥ 1.0 in. w.c. in a still-air test.

Part W10861225

Blower wheel and housing

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First step from the service manual

Get the full diagnostic procedure for 207.

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